Arrangement for heating oil in a gearbox
First Claim
1. An arrangement for warming oil in a gearbox of a combustion engine which is lubricated and cooled by a motor oil, the arrangement comprising:
- a first pipe system, a first flow device operable for circulating motor oil from the combustion engine through the first pipe system;
a second pipe system separate from the first pipe system, a second flow device operable for circulating oil from the gearbox through the second pipe system;
a heat exchanger connected to the first pipe system and to the second pipe system and configured for causing a heat exchange in the heat exchanger between the oils in the first and the second pipe systems, anda control device operative to control the first and second flow devices so that the oils are circulated through their respective pipe systems and are selectively circulated through the heat exchanger in at least certain situations in which the oil in the gearbox is at a temperature below a desired temperature.
1 Assignment
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Accused Products
Abstract
An arrangement for warming the oil in a gearbox in a vehicle powered by a combustion engine. A first pipe system with a first flow device which makes possible circulation of oil from the combustion engine through a heat exchanger. A second pipe system with a second flow device makes possible circulation of oil from the gearbox through the heat exchanger. A control device controls the flow devices so that flow of oil through the heat exchanger is obtained in situations in which the oil in the gearbox is at a too low temperature with respect to a desired temperature. The motor oil in the combustion engine can thus be used for heating the oil in the gearbox during cold starts of the combustion engine.
19 Citations
16 Claims
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1. An arrangement for warming oil in a gearbox of a combustion engine which is lubricated and cooled by a motor oil, the arrangement comprising:
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a first pipe system, a first flow device operable for circulating motor oil from the combustion engine through the first pipe system; a second pipe system separate from the first pipe system, a second flow device operable for circulating oil from the gearbox through the second pipe system; a heat exchanger connected to the first pipe system and to the second pipe system and configured for causing a heat exchange in the heat exchanger between the oils in the first and the second pipe systems, and a control device operative to control the first and second flow devices so that the oils are circulated through their respective pipe systems and are selectively circulated through the heat exchanger in at least certain situations in which the oil in the gearbox is at a temperature below a desired temperature. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification